Organic Lighting Systems
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Organic Lighting Systems

PHOLED (phosphorescent organic light-emitting device) display technology
PHOLED (phosphorescent organic light-emitting device) is the organic light-emitting diode (OLED) a, and its efficiency can be up to 4 times the traditional fluorescent OLED. OLED is a monolithic solid-state devices, usually two layers of thin film conductive electrodes are in the middle of a series of organic thin film composition. If the OLED on the power, conducting carriers (holes and electrons) injected from the electrodes into the organic film. Then, in the electric field, these carriers in the device internal migration, until the complex formation of excitons. Once formed, the excitons, or excited state, will shine through and / or fever the way down to the lower level.
Using traditional fluorescence emission, only about 25% of the exciton energy is converted into light, while the remaining 75% will be lost as heat. By using some of the phosphorescent material, UDC Princeton University in the University of Southern California partners in the late 20th century, 90 found that up to 100% of the exciton energy can be transformed into light.
This finding is a major breakthrough. This means that, OLED efficiency can be achieved in the past to achieve efficiency by 4 times – this makes the current OLED and LCD can be comparable to that in the future but also to work with incandescent lighting and fluorescent lighting to compete.
Features and performance
Table 1 highlights several of our outstanding commercial PHOLED material device performance data.
In addition to the color table, there are many in the “development phase” of the red, green, orange, yellow and blue light-emitting systems, they also have excellent performance.
Energy efficiency record
PHOLED technology and excellent PHOLED materials are to achieve low power consumption OLED displays and lighting are essential. PHOLED external quantum efficiency and luminous efficiency of fluorescent OLED materials 4 times, and therefore reduce the heat and the increased choice of AMOLED backplane. This makes the OLED can be provided with the LCD and traditional light sources to compete in the important advantages. PHOLED can also work under very low voltage, which further enhances their low power consumption.
Bright colors
PHOLED color can be dark red, bright green or even light blue. With the ongoing development, PHOLED color types are still increasing.
Long working life
PHOLED materials, working life in the past few years has made significant progress. Now, the red material has been used in a variety of commercial products, in a variety of working conditions provide a long working life. UDC ongoing commercial assessment of green materials, while the blue material is continuing towards the goal of improving business.
For the production of thermal stability
Many PHOLED materials have been in commercial production test on the device, demonstrating the need for mass production of the long period of time.
The versatility of the production
PHOLED technology and materials to satisfy the various needs of the production process used. Currently, PHOLED materials typically used in vacuum thermal evaporation (VTE) equipment, but it can also be used OVPD organic vapor deposition, laser transcription (LITI) and other new deposition / pattern forming process, including ink-jet currently being developed printing process.
Environmentally friendly
HOLED may be very good “green” display and lighting solutions. PHOLED by improving energy efficiency reduces the energy and non-renewable fossil fuel demand. Consume less energy also means less pressure on the environment. Meanwhile, OLED thin-film structure, small size, which can significantly reduce the prevalence of CRT and fluorescent lamp and remove the waste problem.
Power
UniversalPHOLED intelligent lcd module technology in the importance of manufacturing industry has been recognized, especially for battery-powered OLED mobile display applications. However, although less obvious, but it also has a wall outlet through a large area to meet the needs of the advantages of television and lighting. To demonstrate this advantage, we were using PHOLED and fluorescence of OLED (FL-OLED) technology, active matrix OLED (AMOLED) the power model was established.
PHOLED luminous efficiency is higher than the FL-OLED, up to 4 times the latter. This means that to achieve the same with the FL-OLED pixel brightness, PHOLED only a much smaller current. In AMOLED in, PHOLED can through OLED and TFT (TFT) backplane to reduce power consumption.
Consider the following example: in full-color AMOLED, 30% of the pixels are lit, we are able to achieve PHOLED luminous efficiency compared with the FL-OLED can save 50% power, while the same phase with the current intelligent LCD power than can save 40%. By further optimization of PHOLED, this advantage will be further expanded.
Large area OLED TV also can save a similar power. Although these applications can usually electricity supply, but through the U.S. Department of Energy’s Energy Star (Energy Star) plans and other plans to improve the energy efficiency of television demand more and more intense. In addition, DOE launched to improve the energy efficiency is also the central idea of solid-state lighting. To this end, PHOLED technology to achieve high efficiency white lighting possibilities – for OLED lighting applications used to create new opportunities.
Temperature is not obvious
Because there is no electrical energy into light energy is converted into heat, so the signs and lighting at work usually occurs a rise in temperature. In the large-size OLED television or lighting, this temperature becomes particularly evident. PHOLED technology can significantly reduce this heating. For example, FL-OLED in the temperature will rise about 30 ℃, and PHOLED technology will reduce this value to 10 ~ 17 ℃ (assuming a 40-inch diagonal AMOLED). Lower temperature value is very important. It can extend the life of OLED, since the speed of aging and temperature. It also alleviate the need to transfer the heat generated by the pressure of air-conditioning needs – which makes PHOLED technology as all the “green” or environmentally important elements of strategy.
Backplane compatibility
At present, the amorphous silicon (a-Si) backplane technology is the mainstream technology, it has matured, the installation of low cost production base. Low-temperature polysilicon (LTPS) is a relatively new technology, which uses a more complex process, the yield is lower than the a-Si. However, LTPS higher performance – it provides a higher carrier mobility, so the driver circuit can be integrated directly on the substrate to reduce costs, especially for small area display. LTPS the past, people also believe that a higher mobility provided by large current-driven OLED is to meet the required conditions. Before the advent of the PHOLED, this idea is right. PHOLED small current drive TFT backplane reduces power consumption, thereby reducing the demand for mobility. Therefore, PHOLED a-Si backplane technology as it can be applied in large area displays the key factor. In the future, PHOLED may also contribute to the industry to adopt low-cost organic TFT.
P2OLED
P2OLED printable, phosphorescent display module materials and technology are promoting low-cost and efficient PHOLED technology and printing equipment combined. Such as inkjet printing, it is possible for large area OLED displays provide a more cost-effective solutions. In the use of solution-based manufacturing process, P2OLED printable, phosphorescent OLED materials development has made significant progress. Seiko Epson Corporation (Epson), held in Los Angeles Society for Information Display Symposium 2008, a joint paper published in the view that these developments to some extent benefited from the production of joint development projects. With high light efficiency PHOLED technology and development, through the use of a complete set of UDC’s OLED materials development, the team extended spin coating the bottom of the launcher in the red and green materials P2OLED working life has made significant progress on
Hi – I am a black woman. Does the chemicals from a perm get into the blood system of me and my unborn child?
As a black woman and marathon runner, the sun does enough damage to my hair…so there is no way that I can press it everyday to get it straight. I appreciate my roots and love my curly hair, but some days I like it straight and others I wear it curly. As such, I’ve opted for very very light relaxer and do not leave it on for more than 10 minutes—-that’s with putting it in and everything. But I wanted to know if I coluld be affecting the brain growth and blood system of myself and my unborn child. I always base my hair and eat only organic foods – whenever some ridiculous craving doesn’t hit (smile).
So I’m just trying to be certain that I’m not harboring a negative environment for myselgf and my child. My GYN is non-black so I’m not sure if she’d understand my hair. So if there are any sisters out there who are marathon runners, and are pregnant or have been and still want to be fit and fabulous, please help me.
If the chemical calcium hydrox is harmful, please help!
There is minimal chances that you are doing any damage to your unborn child. And congradulations, just the same. As long as you are concerned, you appear to have more on the ball than most expectant mothers, regardless of race. A healthy diet (vitamins and any prescribed medication from your doctor) and exercise is the best for both you and the baby. Good luck and again congradulations.
Transparent OLED (Organic Light Emitting Diode) by Dupont
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